"泛交就是男人的本能" but it's also men's instinct
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送交者: Warcraft 于 2007-12-14, 11:41:20:
回答: 你的思维越飘越远了. 看看猴群是咋整这事的. 听说过远古群婚和偶婚吗? 由 校长 于 2007-12-14, 11:13:26:
to seek faithful wife or partner, so they can be fully devoted to raising their children. Marital system is a consequence of such a need.
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